They test batches of blood and have to throw out the entire batch if one hiv person is mixed in. Gays are virtually the only ones that get aids anymore and are excluded for that and the countless other diseases they get during their 'bug catching' fetishes.

And they care so much about blood and the need for it that they actively exclude "white supremacists" and anyone that has tattoos, look like them or are labelled as such, including everyone on the dot win network.